Riveting machine



July 2s, 1925. 1 1,547,281

' R. A. WORKMAN RIVETING MACHINE Filed April '8, 1924 v 2 Sheets-Sheet 1 sa 4S attorney July 28, 1925.

` R. A. WORKMAN RIVETING MAcHiNE Patented July 28, 1925.

yUNfrlfl-:D STATES 1,547,281 PATENT OFFICE.

Ross IA. WOEKMAN, on' TULSA, oirnanoivra, AssIGNoR To WoExMAN SHEET METAL COMPANY, or TULSA, OKLAHOMA, A- FIRM coMP'osED oF sAIn Rossa. WORK-MAN,

EARL awoitKMArr, Anno. M. Herr.'

RIVETING MACHINE;

Application filed April 8, 1924i Serial No'. 705,041.

To aZZfwLom t may' concern.'

Be it known that I, Ross A. WORKMAN, a citizen of the Unitedy States, residing at Tulsa, in the county of TulsaY and State of Oklahoma', have invented' certain new l and useful Improvements in Rivet-ing Machines, of which the following is a specication, reference-being had therein to the accompanying drawing.

The present'invent'i'on relates to riveting machines, and' aims to provide a'novel and improved machine for setting rivets inthe standing seams of sheet metal roofs,such as are lused on o`il tanks, in'order that the rivets can be conveniently andl efficiently swa'ged or crushed.

Another object is they provision of such av machine forriveting the upstanding seams of sheetI metal'roofs, without bending or injuring the seams, the machine having means for clamping or holding the seam during the riveting operation. v

A -still furtherfobject is the provision of a riveting machine'of such construction that it can rest on the roof over the seam, and the machine having manually operable means for clamping'the seam and holding the rivet in place, and other manually operable means for swaging or setting the rivet.

It is a'ls'oan` object of the invention to improve the machine generally inits Aconstruotiontand details lto enhance the utility and efficiency thereof.

With' the foregoing and other objects in view, whichv will beapparent as the description proceeds, the invention resides in the construction and arrangement of parts, as hereinafter described and claimed, it being understood that changes can be made within the 'scope of what is claimed, withoutl de parting fromthespirit of the invention.

The invention isillustrated in the accom# panyingdrawings, wherein-.-

Figure 1` is a sideelevation of the improved machine, portions being broken away.`

Fig. 2 is a` plan view thereof, portions being brokenaway and shown in section.

Fig. 3- is a vertical section on the line V3--3 of Fig. 2'. i

Fig. 4 is a' horizontal section on the line of Fig. 1.

The base` or body 7 of the machine may be a casting, forging, or other suitable .mem

the opening of the arch, being fitted inf' a recess lfl with which the arch 8` is provided at said side of the opening. The anvil 10 has an extension 12 projecting away from said opening and fittedy in abore or opening 13 with which thev arch'8' ispr'ovid-ed, said openingtextending from'the recess 11 tothe corresponding end of the base 7. A draft screw 14 is threaded into the extension 12 and has its head seated against the end of the base 7, thereby7 drawing the anvil" l0 tightly into placeinthe recess 11; Another clamping screw 15 .extends upwardly through the anvil' 10 and is threaded into the arch V8 above the recess 11, thereby clamping` the vanvil upwardlyy inV said re"- cess, the anvil'having a4 cavityT 16' at the bottom thereof in* which the' head ofthe screw. 15is housed. By removing the'screws 14 and 15, the anvil is'jreadily removed for repair or replacement.

In order to steady and brace' the base 7 whenA subjectedto' pressure,bars 1,7 are secured, by rivets 18' or' otherwise, to the opposit'e'sides of'the'base7 at the'end thereof where the anvilis located, and' said bars'project beyond Asaid en'd'` of the base and are bentv apartlto provide the diverging` por'- tions 191which are adapted to bear on the roof, the lower edges of the bars being-flush with the bottom surface of` the base 7. The bars 17 'prevent thev base being tilted laterallyyor toward the operator when the leversa're' depressed, as will hereinafter more fully'app'ear. f y y The' anvil 10 is 'clamped against` one?, side of the upstanding seam 9, to maintain the baseA infa fi'x'e'd'position relativelyy to? the seam; durngthe'setting or swaging' of the rivet. The clamping means; includes bell crank: levers 2() disposed at opposite sides of the arch and fulcrumed tothe based' by a ful'crum bolt 2l extending transversely through said-levers andarch above thefopeningl ofthe arch, and the depending'arms of said levers provide jaws 22v atV opposite sides ofthe base and at that'V side'of the opening ofvthe arch opposite to' thef anvil 10,* where- CII by the aws 22 can be swung against the side of the seam 9 opposite'to the side against which the anvil or jaw 10 bears.

. The jaws 22 are operated by a lever 23,-

which is in an inclined position above the bars 17, and which is composed of the spaced angular bars 24 having a handle 25 secured between them. The bars 24 provide a fork straddling the bars 17 and base 7, and the bars 24 are mounted on a fulcrum bolt 26 extending transversely through the bars 17 at the corresponding end of the base. The` bars 24V are connected with the levers 2O by the pivot bolts 27 which are sufficiently loose to permit of relative swinging movement between the levers 23 and 20.

lVhen the lever 23 is depressed, the levers 2O are swung to move the jaws 22 toward the anvil 10, for clamping the seam 9 between said jaws and anvil, as indicated by dotted lines in Fig. 1.

A coiled spring 28 connects the lever 23 and arch 8 to normally raise the lever so as to swing the aws 22 away from the anvil. The ends of the spring 28 are engaged with screw eyes 29 secured in the arch 3 and handie 25, although other attaching means can be used.V

The swaging or setting of the rivets is done by a cross-head or slide 30 movable in a recess 31 with which the base 7 is provided at that side of the opening of the arch opposite to the anvil 10, and said cross head or slide carries the plunger or die 32 that crushes or mashes the rivet. The plunger or die 32 is disposed between the jaws 22, and the slide 30 has a tail or extension 33 iitting slidably in a bore 34 in the base 7 extending from the recess 31 to the corresponding end of the base- A rod or seam 35 is threadedly or otherwise engaged in the extension 33 and has a nut 36 threaded on the free end thereof. The rod 35 passes between a pair of rivets 37 engaged transversely through the base 7 and extending transversely through the bore 34 beyond the extension 33. Said rivets provide a` seat for a coiled spring 38 surrounding t-he rod 35 and confined between the nut 36 and rivets 37. The nut 36 is adjustable to regulate t-he tension of the spring, and the spring, as will be apparent, exerts pressure on the rod 35 to retract the plunger 32 from the rivet and seam.

In order to pro-ject the plunger 32 to swage the rivet, thrust bars 39 are disposed at opposite sides of the base 7 and their ends are seated in notches in the cross head or slide 30, as at 40. Said bars 39 have circular openings 40 in which eccentrics 42 are disposed, said eccentrics being movable with a hand lever 43 that is inclined similarly to the lever 23 above the arch. Rollers or anti-friction members 44 are disposed in the openings 4l between the eccentrics 42 and the thrust bars 39, to reduce friction. The lever 43 comprises the spaced bars 45 and a handle 46 secured between said bars, the bars 45 providing a fork straddling the base 7 and bars 39, and the eccentrics 42 are secured to or are a part of the bars 45. The bars 45 overlap the bars 39 and the eccentrics extend inwardly into the openings 41, as seen in Fig. 4. A pivot or fulcrum bolt extends through the bars 45, ec-

centrics 42 and base 7 above the bore 34 and eccentrically relatively to the openings 41 and eccentrics 42, and the arrangement is such that when the lever 43 is swung upwardly, the eccentrics 42 force the thrust bars 49 toward the anvil 10, thereby shoving the plunger 32 toward the seam and rivet. The lever 43 swings downwardly by gravity, to retract the thrust bars 39, and the spring 38 retracts the plunger 32.

r1`he base 7 has oil ducts 48 extending downwardly to the plunger extension 33 and :tulcrum bolt 47 in order that oil can be injected to lubricate said parts.

In using the machine,the rivet 49 is inserted through the seam 9 from that side at which the anvil 10 is located, and the base 7 is then slid into position to bring the anvil 10 against the head of the rivet, as

seen in Fig. 1. The anvil 10 is of a size to project under the overhanging portion of the seam. The lever 23 is then depressed to bring the jaws 22 against the seam 9, thereby clamping the seam between the jaws 22 and anvil 10, with the head of the rivet held tightly between the seam and anvil. rlhe lever 43 is then raised so that the eccentrics 42 project the plunger 32, and the plunger therefore mashes or swages the rivet at the corresponding side of the seam, to set the rivet lsecurely in the seam. r:[he rivet is therefore set in a convenient and efficient manner, and the swaging of the rivet is done neatly.

In applying the machine after the rivet is inserted in the aperture in the seam, the movement of the jaws 22 toward the anvil by the depression of the lever 23, will force the anvil 10 toward the seam, thereby pushing the rivet into place in the seam, and, at the same time, the seam is clamped hetween the jaws and anvil, thereby fixing the position of the base relatively to the seam, before the rivet is swaged. By use of the lever 43 and eccentrics 42, the plunger is moved with great force toward the anvil without excessive manual exertion, so that minimum power is necessary. It is also practically impossible for the operator .to crush the rivet without first positioning the rivet properly in the seam, inasmuch as the depression of the lever 23 will not only clamp the seam between the jaws 22 and anvil, but will also force the rivet into place in the seam.

Although the machine is advantageous in connection with standing seams having flanged or overhanging portions, as shown in Fig. 1, the machine can be used for other kinds of upstanding seams.

Having thus described the invention, what is claimed as new is:-

l. A riveting machine comprising a base having a bottom surface to rest movably on sheet metal and having an opening in said surface to receive a standing seam of the metal, an anvil carried by the base to be disposed at one side of the seam, means carried by the base and operable for clamping the seam and anvil together, and rivet sett-ing means carried by the base opposite to the anvil.

2. A riveting machine comprising a base having a bottom surface t0 bear movably on sheet metal and having an opening in said surface to receive a standing seam of the metal, an anvil carried by the base to be disposed at one side of the seam, clamping means carried by the base including a jaw to bear against the seam opposite to the anvil for clamping the seam between said jaw and anvil, and rivet setting means carried by the base movable toward and away from the seam at the side opposite to the anvil.

3. A riveting machine comprising a base having a bottom surface to bear movably on sheet metal and having an opening in said surface to receive a standing seam of the metal, an anvil carried by the base to be disposed at one side of the seam, a pair of` jaws carried by the base and movable toward the anvil for clamping the seam between the jaws and anvil, means for operating said jaws, a rivet setting member carried by the base movable toward and away from the anvil between said jaws, and means for operating said member.

4. A riveting machine comprising a base having an arch to receive a standing seam, an anvil carried by the base at one side of the opening of the arch to be disposed at one side of the seam, levers fulcrumed to the base at the opposite sides thereof above said opening and having depending aws to move toward and away from the anvil at the opposite side of the seam, a hand lever fulcrumed to the base and operatively connected with said levers for swinging the jaws, a rivet setting member movable in the base toward and away from the anvil between said jaws, and means for actuating Said member.

5. A riveting machine comprising a base, an anvil carried by the base, a rivet setting member having an extension slidable in the y base for the movement of said member toward and away fro-m the anvil, spring means for retract-ing said member from the anvil, thrust bars at opposite sides of the base and said extension having ends engaging said member, and a hand lever fulcrumed to the base having portions at opposite sides gf the base operatively connected with said ars.

6. A riveting machine comprising a base, an anvil carried by the base, a rivet setting member having an extension slidable in the base for the movement of said member toward and away from the anvil, spring means for retracting said member from the anvil, thrust bars at opposite sides of the base and said extension, said member having notches in which said bars are seated at one end, and a hand lever having portions at opposite sides of the base fulcrumed to the base and provided with eccentrics, said bars being disposed between said portions and base and having openings receiving said eccentrics.

7. A riveting machine comprising a base, an anvil carried by the base, a rivet setting member carried by the base and movable toward and away from the anvil, an operating lever fulcrumed to the base and operatively connected with said member, clamping means carried by the base and movable toward and away from the anvil, an operating lever connected to the clamping means and eX- tending upwardly from the base, and bars secured to the base and diverging therefrom to brace the base against tilting movement.

In testimony whereof I hereunto affix my signature.

Ross A. WoRKMANf. 

